Provisional estimates of the population of counties and metropolitan areas
MLA
Provisional Estimates of the Population of Counties and Metropolitan Areas. [Washington, D.C.]: U.S. Dept. of Commerce, Bureau of the Census
APA, 7th edition
Provisional estimates of the population of counties and metropolitan areas. [Washington, D.C.]: U.S. Dept. of Commerce, Bureau of the Census
Chicago, 17th edition
Provisional estimates of the population of counties and metropolitan areas. [Washington, D.C.]: U.S. Dept. of Commerce, Bureau of the Census